Calipso was built to be a simple Node.js based CMS, similiar to Drupal and Wordpress.
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Pro Calipso supports the use of stylus in CSS
Calipso also supports the use of stylus for stylesheets and themes. This means that customizing themes with Calipso is very easy.
Pro Calipso runs with MongoDB and Express in the background
Calipso uses MongoDB through Mongoose as a database and it runs on top of Express, the most popular framework for Node. Making it very simple for anyone experienced in Express and used to working with Mongo.
Pro Calipso is built using a modular approach
Calipso delivers it's functions by using a modular approach. All of the core features that you would expect from a CMS, excluding theming and forms are provided by modules.
Con Has been inactive for long
Con Installation may be a little hard
Because of Calipso's modular approach, it can be a little hard to get everything ready because if some modules are missing, it can cause trouble.